Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 759 · 40 questions

What you do (Coins × distance): 1. Balance the ruler on the pencil at its 15 cm mark. 2. Put coins at a measured distance on the left side. 3. Place coins on the right and slide them until the ruler balances. 4. Check: coins × distance on the left = coins × distance on the right; press gently.

1. 1.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) which side goes down (c) where the pencil is
2. 2.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) False (b) True
3. 3.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) stand on the ruler (d) flick coins at faces
4. 4.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) easier (d) the same
5. 5.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the effort (c) the load (d) the axle
6. 6.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 3 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
8. 8.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) the left side (b) neither, it balances (c) the right side (d) both go up
9. 9.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a magnet (c) a round pencil (d) a flat table
11. 11.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a crowbar (c) a tap handle (d) a ramp
12. 12.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) yeast (c) a magnet (d) a battery cell
13. 13.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) distance from the pencil (c) the kind of coins
14. 14.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a mirror (c) a flat table (d) a 30 cm ruler
15. 15.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a battery cell (c) coins of one kind (d) a round pencil
17. 17.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too shiny (c) they may swallow them (d) they are too cold
18. 18.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) jump up and down (c) sit on the middle (d) sit farther from middle
19. 19.⚙️ Which of these is a lever? (a) a well pulley (b) a doorknob (c) a tap handle (d) a crowbar
20. 20.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
21. 21.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) turmeric powder (c) a magnet (d) a round pencil
22. 22.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a battery cell (c) a flat table (d) a round pencil
23. 23.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) turmeric powder (c) a round pencil (d) coins of one kind
24. 24.True or false: a magnet is needed for the ruler lever. (a) False (b) True
25. 25.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “distance from the pencil”? (a) we measure it (b) we keep it the same (c) we change it
26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) distance from the pencil (c) where the pencil is (d) the number of coins
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
28. 28.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
29. 29.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
30. 30.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
32. 32.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 10 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a mirror (d) a round pencil
35. 35.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) turmeric powder (c) a round pencil (d) a 30 cm ruler
37. 37.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
38. 38.⚙️ Which of these uses a pulley? (a) a flagpole (b) a spoon lifting a lid (c) a bottle opener (d) a crowbar
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) a magnet (d) coins of one kind
40. 40.True or false: a flat table is not needed for the ruler lever. (a) True (b) False

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